• Removed Python 3.4 support
• Removed Python 3.5 support
• Added Python 3.9 support
• Allowing StyleFrame.ExcelWriter to accept any argument (except for engine) that pandas.ExcelWriter accepts
• Allowing customizing formats of date, time and datetime objects when creating Styler instances
• Fixed rows mis-alignment issue when calling to_excel with header=False (GitHub issue #88)
• read_excel does not accept sheetname argument anymore (was deprecated since version 1.6). Use sheet_name instead.